> On 07/06/10 05:04, Rafael J. Wysocki wrote:> > On Sunday 06 June 2010, Maxim Levitsky wrote:> >> On Sun, 2010-06-06 at 15:57 +0200, Rafael J. Wysocki wrote:> >>> On Sunday 06 June 2010, Maxim Levitsky wrote:> > ...> > > >>> So how TuxOnIce helps here?> >> > >> Very simple.> >> > >> With swsusp, I can save 750MB (memory) + 250 Vram (vram)> >> With full memory save I can save (1750 MB of memory) + 250 MB of> >> vram....> > > > So what about being able to save 1600 MB total instead of the 2 GB> > (which is what we're talking about in case that's not clear)? Would> > it be _that_ _much_ worse?> > That all depends on what is in the 400MB you discard.> > The difference is "Just as if you'd never hibernated" vs something> closer to "Just as if you'd only just started up". We can't make> categorical statements because it really does depend upon what you> discard and what you want to do post-resume - that is, how useful the> memory you discard would have been. That's always going to vary from> case to case.

Nigel and Rafael, how about just testing it?

Whats needed to have 80% of the memory saved instead of 50%?

I think its important to go the next steps towards a better snapshot in mainline kernel even when you do not agree on the complete end result yet.

What about

- Rafael, you review the async write patches of Nigel. If they are good, IMHO they should go in as soon as possible.

- Nigel and/or Rafael, you look at whats needed to save 80% instead of 50% of the memory and develop a patch for it

?

Then this goes into one stable kernel series and be tested in the wild. And if that approach does not suffice to give a similar experience than with TuxOnIce one could still look further. In that case I ask you Rafael, to at least listen open-mindedly to practical experiences being told and to ideas to improve the situation.

I really want to see this make some progress instead of getting stuck in discussion loops again. No offence meant - you do the all the development work! - but the time spent here IMHO is better spent on reviewing and furtherly refining the existing patches by Nigel and Jiri and developing a patchset for the 80% solution which should already help a lot.